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Montana Field Guide

Montana Field Guides

Rocky Mountain Yellowcress - Rorippa curvipes

Native Species

Global Rank: G5
State Rank: SNR
C-value: 4

Agency Status


External Links

General Description
Taprooted annual to perennial. Stems prostrate to ascending, 5–20 cm long, branched with racemes terminal and from upper leaf axils. Leaves all cauline, petiolate, oblanceolate, 2–8 cm long, crenate-dentate to pinnately lobed, the terminal lobe largest. Vestiture of simple hairs. Petals yellow, 0.7–2 mm long. Fruit an ovoid silicle, 2–6 mm long, 1.3–2 mm wide, glabrous; style 0.4–1 mm long; pedicels spreading, 2–5 mm long. Montana has varieties curvipes and alpina (S. Watson) Stuckey (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Range Comments
AB, ND, SD, WI west to the Great Plains and WA, OR, ID, MT, WY, NV, UT, CA, CO, NM, AZ.

Observations in Montana Natural Heritage Program Database
Number of Observations: 5

(Click on the following maps and charts to see full sized version) Map Help and Descriptions
Relative Density



(Observations spanning multiple months or years are excluded from time charts)


The following animal species have been reported as pollinators of this plant species or its genus where their geographic ranges overlap: Bombus rufocinctus (Thorp et al. 1983).

  • Literature Cited AboveLegend:   View Online Publication
    • Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
    • Thorp, R.W., D.S. Horning, and L.L. Dunning. 1983. Bumble bees and cuckoo bumble bees of California (Hymenoptera: Apidae). Bulletin of the California Insect Survey 23:1-79.
  • Additional ReferencesLegend:   View Online Publication
    Do you know of a citation we're missing?
    • Lesica, P., M.T. Lavin, and P.F. Stickney. 2022. Manual of Montana Vascular Plants, Second Edition. Fort Worth, TX: BRIT Press. viii + 779 p.
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Citation for data on this website:
Rocky Mountain Yellowcress — Rorippa curvipes.  Montana Field Guide.  .  Retrieved on , from